EP0629430A1 - Verfahren zum Entschwefeln von Abgas - Google Patents

Verfahren zum Entschwefeln von Abgas Download PDF

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Publication number
EP0629430A1
EP0629430A1 EP94114153A EP94114153A EP0629430A1 EP 0629430 A1 EP0629430 A1 EP 0629430A1 EP 94114153 A EP94114153 A EP 94114153A EP 94114153 A EP94114153 A EP 94114153A EP 0629430 A1 EP0629430 A1 EP 0629430A1
Authority
EP
European Patent Office
Prior art keywords
desulfurizing
flue
exhaust gas
gas
slurry
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP94114153A
Other languages
English (en)
French (fr)
Other versions
EP0629430B1 (de
Inventor
Toshimitsu C/O Nagasaki Techn. Inst. Ichinose
Kimishiro C/O Nagasaki Techn. Inst. Tokuda
Yuichi C/O Nagasaki Techn. Inst. Fujioka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority claimed from EP91120292A external-priority patent/EP0492167B1/de
Publication of EP0629430A1 publication Critical patent/EP0629430A1/de
Application granted granted Critical
Publication of EP0629430B1 publication Critical patent/EP0629430B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B01D53/50—Sulfur oxides
    • B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B01D53/50—Sulfur oxides
    • B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
    • B01D53/504—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific device

Definitions

  • pulverized coal 11 and pulverized limestone (CaCO3) 12 are fed to a combustion furnace 10, and desulfurization within furnace is carried out.
  • SO x component in the combustion gas exhausted from the combustion furnace 10 is further desulfurized in a desulfurizing flue 20 in which slurry 21 is sprayed.
  • This slurry 21 is produced by mixing a part 31 of fly ash collected from the combustion gas exhausted from the desulfurizing flue 20 by means of an electrostatic precipitator (hereinafter called EP) 30 with water 32 in a mixing machine 40.
  • EP electrostatic precipitator
  • an apparatus for desulfurizing exhaust gas comprising a combustion furnace in which furnace desulfurization is carried out by means of charged limestone, a desulfurizing flue connected to a flue of exhaust gas of the combustion furnace and having water sprayed therewithin, a gas/gas heater disposed in the flue of exhaust gas between the combustion furnace and the desulfurizing flue for heating the exhaust gas of the desulfurizing flue by the exhaust gas of the combustion furnace, a dust precipitator for collecting an ash component in the exhaust gas of the desulfurizing flue exhausted from the gas/gas heater, and a mixer for converting the ash component collected in the dust precipitator into slurry to spray the slurry within the desulfurizing flue.
  • the exhaust gas fed to a desulfurizing flue from a combustion furnace has its temperature lowered in a gas/gas heater by carrying out heat-exchange with the exhaust gas having its temperature lowered as a result of treatment by quick lime slurry in the desulfurizing flue, a desulfurization efficiency by quick lime slurry in the desulfurizing flue is improved.
  • the above described exhaust hole 112 of exhaust gas is connected to the above-described gas/gas heater 60, while the above-mentioned slurry exhaust hole 113 is connected to a pump 120, a part 63 of the slurry exhausted from the slurry exhaust hole 113 is sprayed into the flue evaporator 80, the remainder of the slurry is adapted to be fed to the grinding chamber 101 of the desulfurizing flue 70 as circulating slurry as will be described later.
  • the water 32 is fed, if necessary, depending upon a concentration of the aqueous hydrogen peroxide to be fed.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Treating Waste Gases (AREA)
  • Chimneys And Flues (AREA)
EP94114153A 1991-08-13 1991-11-27 Verfahren zum Entschwefeln von Abgas Expired - Lifetime EP0629430B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP202767/91 1991-08-13
JP3202767A JP3035015B2 (ja) 1991-08-13 1991-08-13 脱硫方法
EP91120292A EP0492167B1 (de) 1990-11-28 1991-11-27 Vorrichtung zum Entschwefeln von Abgas

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP91120292.7 Division 1991-11-27

Publications (2)

Publication Number Publication Date
EP0629430A1 true EP0629430A1 (de) 1994-12-21
EP0629430B1 EP0629430B1 (de) 1996-10-23

Family

ID=16462836

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94114153A Expired - Lifetime EP0629430B1 (de) 1991-08-13 1991-11-27 Verfahren zum Entschwefeln von Abgas

Country Status (4)

Country Link
EP (1) EP0629430B1 (de)
JP (1) JP3035015B2 (de)
AT (1) ATE144437T1 (de)
DE (1) DE69122892T2 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU692014B2 (en) * 1994-11-28 1998-05-28 Abb Flakt Ab Method for separating gaseous pollutants from hot process gases
US6096279A (en) * 1997-03-03 2000-08-01 Mitsubishi Heavy Industries, Ltd. Flue gas treating process and system
EP2581662A3 (de) * 2011-10-11 2017-10-18 RWE Power Aktiengesellschaft Verfahren zur Behandlung von Verbrennungsrückständen an Wärmetauschflächen von Verbrennungsanlagen
CN114409290A (zh) * 2021-12-28 2022-04-29 北京北科环境工程有限公司 一种基于高炉煤气加热改性脱硫灰的装置与方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5177965B2 (ja) * 2006-06-16 2013-04-10 中国電力株式会社 排ガス中の有害微量元素を捕捉する方法。

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3308927A1 (de) * 1983-03-12 1984-09-13 L. & C. Steinmüller GmbH, 5270 Gummersbach Verfahren zur bindung von in rauchgasen enthaltenen gasfoermigen schadstoffen
EP0301272A2 (de) * 1987-07-29 1989-02-01 Waagner-Biro Aktiengesellschaft Verfahren und Vorrichtung zur Abgas- oder Abluftreinigung
WO1991002583A1 (en) * 1989-08-22 1991-03-07 ABB Fläkt AB Method for reducing wear on nozzles or other supply means

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3308927A1 (de) * 1983-03-12 1984-09-13 L. & C. Steinmüller GmbH, 5270 Gummersbach Verfahren zur bindung von in rauchgasen enthaltenen gasfoermigen schadstoffen
EP0301272A2 (de) * 1987-07-29 1989-02-01 Waagner-Biro Aktiengesellschaft Verfahren und Vorrichtung zur Abgas- oder Abluftreinigung
WO1991002583A1 (en) * 1989-08-22 1991-03-07 ABB Fläkt AB Method for reducing wear on nozzles or other supply means

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU692014B2 (en) * 1994-11-28 1998-05-28 Abb Flakt Ab Method for separating gaseous pollutants from hot process gases
US6096279A (en) * 1997-03-03 2000-08-01 Mitsubishi Heavy Industries, Ltd. Flue gas treating process and system
EP2581662A3 (de) * 2011-10-11 2017-10-18 RWE Power Aktiengesellschaft Verfahren zur Behandlung von Verbrennungsrückständen an Wärmetauschflächen von Verbrennungsanlagen
CN114409290A (zh) * 2021-12-28 2022-04-29 北京北科环境工程有限公司 一种基于高炉煤气加热改性脱硫灰的装置与方法

Also Published As

Publication number Publication date
JPH0749114A (ja) 1995-02-21
JP3035015B2 (ja) 2000-04-17
DE69122892D1 (de) 1996-11-28
EP0629430B1 (de) 1996-10-23
ATE144437T1 (de) 1996-11-15
DE69122892T2 (de) 1997-03-13

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